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Add the text of use of inheritance (#22097)

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Shubhanshu Pratap Singh
2018-11-18 15:02:43 +05:30
committed by Niraj Nandish
parent dff64a339d
commit 9d8e538ac0
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guide/english/java/inheritance/index.md
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@ -8,6 +8,16 @@ Java inheritance refers to the ability of a Java Class to `inherit` the properti
* The Class that extends or inherits is called a **subclass** * The Class that extends or inherits is called a **subclass**
* The Class that is being extended or inherited is called a **superclass** * The Class that is being extended or inherited is called a **superclass**
## Why use inheritance in java
- For Method Overriding (so runtime polymorphism can be achieved).
- For Code Reusability.
## Terms used in Inheritance
- Class: A class is a group of objects which have common properties. It is a template or blueprint from which objects are created.
- Sub Class/Child Class: Subclass is a class which inherits the other class. It is also called a derived class, extended class, or child class.
- Super Class/Parent Class: Superclass is the class from where a subclass inherits the features. It is also called a base class or a parent class.
- Reusability: As the name specifies, reusability is a mechanism which facilitates you to reuse the fields and methods of the existing class when you create a new class. You can use the same fields and methods already defined in the previous class.
Thus, inheritance gives Java the cool capability of _re-using_ code, or sharing code between classes! Thus, inheritance gives Java the cool capability of _re-using_ code, or sharing code between classes!
Let's describe it with the classic example of a `Vehicle` class and a `Car` class : Let's describe it with the classic example of a `Vehicle` class and a `Car` class :